“Commands out of sync; you can't run this command now” - Caused by mysqli::multi_query

Question

I am running multiple deletes through mysqli::multi_query and it is messing up the next query in line. The following error is being thrown.

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Answer 1

This helped me to remove 'Commands out of sync' error:

do { 
    $mysqli_conn_obj->use_result(); 
}while( $mysqli_conn_obj->more_results() && $mysqli_conn_obj->next_result() );

Add this code just after calling multi_query, it will use the result sets and resolve the error.